handling, storage, and disposal of hazardous materials. HUB—A Navy-operated facility that processes DLR and provides verification of drawing/part number to NSN, corrects erroneous documents, makes the MRIL inquiry to determine the DOP/DSP, and to cut off carcass tracking. Also prepares and submits Reports of Discrepancy (ROD)/Transportation Discrepancy Reports to cut off carcass tracking. Repacks material for shipment. ILLUSTRATED PARTS BREAKDOWN—A list prepared by the manufacturer for each model aircraft, engine accessory, electronic equipment, or support equipment (SE). IMPREST FUND—A simple, economic purchase method used for small purchases. The imprest fund is a cash fund for which small payments are made at the time of purchase from a commercial vendor. INTEGRATED LOGISTICS OVERHAUL—A concerted effort of assigned shipboard personnel, under the supervision of an ashore-based ILO team, to refine shipboard inventories of repair parts, update related stock records consistent with authorized allowances or other stockage objective criteria, and identify material or excess stock. INTERCHANGEABLE ITEM—A nonequivalent item that is used in place of another item in all applications. INTERMEDIATE MAINTENANCE ACTIVITY— Any aviation activity (ship or station) authorized to provide intermediate level maintenance support. It consist of the intermediate maintenance department, the supply department, the weapons department, the public works department, and the engineering department. INVENTORY CONTROL POINTS—The primary support activities of the Naval Supply Systems Command, bureaus, systems commands, and offices that exercise inventory control over specific categories of material. LOGISTICS APPLICATIONS OF AUTOMATED MARKING AND READING SYMBOLS—A system designed to improve the accuracy and productivity of the receipt and stowage process. It is a system used by SUADPS-RT activities to record incoming transactions by reading bar-coded symbols. MAINTENANCE CODE—Two-position codes used in Source, Maintenance and Recoverability (SM&R) codes, with the first position indicating the lowest maintenance level authorized to remove, replace, and use the support item. The second position indicates the maintenance level with the capability to perform complete repair. MATERIAL OBLIGATION—Unfilled quantity of a requisition that is not immediately available for issue, but is recorded by the inventory manager or stock point as a commitment for future issue. MATERIAL OBLIGATION VALIDATION—A system used to verify the unfilled quantity of a requisition that is not immediately available for issue to the requisitioner, but is recorded as a commitment against existing or prospective stock dues or direct deliveries from vendors. MILITARY ORDINARY MAIL—A special pro- cedure approved by the U.S. Postal Service for providing air transportation of official fourth-class mail at a rate considerably cheaper than for priority mail. It may also be used for official second- and third-class mail if considered essential to timely delivery. MISSING, LOST, STOLEN, OR RECOVERED (MLSR)—A program that requires the reporting of missing, lost, stolen, or recovered material. NATIONAL CODIFICATION BUREAU (NCB) CODE —A two-digit code included in the fifth and sixth digits of a national stock number (NSN) or a NATO stock number. In an NSN, it identifies the United States as the country that assigned the stock number. In a NATO stock number, it identifies the NATO country that assigned the stock number or indicates that the stock number is used by two or more countries. NAVY ITEM CONTROL NUMBER (NICN)—Items of material that are not included in the Federal Catalog System, but are stocked or monitored in the Navy supply system. NICNs are 13-character identification numbers assigned by ICPs or other Navy item managers for permanent or temporary control of selected non-NSN items under their cognizance. NET UNIT PRICE—Price charged for a DLR when the carcass will be turned in. Net unit price includes repair cost, replacement cost when item is BCM, and a surcharge. NEXT HIGHER ASSEMBLY—Refers to the next higher assembly on or with which an item is used as a subassembly, part, attachment, or accessory. AI-3